01 Neutral photo
Photograph the posture you intend to judge
A tilted camera or changed posture moves the visual frame. Use a straight-on reference and re-check the actual client before transfer.
Free placement preflight
Tattoo Stencil Centerline Checker
Check a centered stencil against the body landmarks you actually want to trust. Mark a visual axis on a real photo, place the stencil, compare angle and center offset, then export a consultation reference.
Free to useNo accountNo AI anatomy guessPhotos stay in your browser
Centerline workspace
Mark two body landmarks, place one stencil, then compare its design axis with the visual axis you chose.
Photo setup
Use a straight-on photo with the client in the posture you want to evaluate. Mark two landmarks that you, as the artist, want to use as the visual axis. The tool does not decide the anatomical center for you.
Centered does not mean mathematically mirrored
Choose the body reference first, then judge the stencil against it.
Sternum, spine, chest-center, and ornamental placements make small alignment errors easy to see. But real bodies also contain normal left-right differences. This tool keeps the decision with the artist: define the visual axis you want to use, then measure the stencil against that choice.
02 Artist landmarks
Do not let software invent the body axis
Mark the landmarks that matter for this placement. The checker records your chosen reference instead of claiming an automated anatomical truth.
03 Design axis
Separate rotation from lateral centering
A stencil can be parallel to the chosen body axis and still sit to one side. Angle and center offset stay separate so one adjustment does not hide the other.
04 Visual correction
Perfect numerical zero is not the goal
The readout is a reference. If a deliberate offset produces better visual balance on the real body, preserve the artist decision rather than forcing a number to zero.
Use the right placement tool
Centerline, body fit, and exact size are three different decisions.
Keeping them separate avoids false precision. Centerline Checker handles photo-space alignment. Fit to Body handles wrap and taper in the iPhone app. Size & Print handles physical dimensions after placement is settled.
Centerline Checker
Is the design aligned to the visual axis I chose?
Compare design angle and center offset on one straight-on body photo, with no anatomical auto-detection.
Fit to Body
How should the stencil follow body curvature?
Use the app workflow for wrap, taper, body-line direction, and optional body-photo placement preview.
Open Fit to BodySize & Print
What exact physical size should reach paper?
Set centimetres or inches and generate true-size output only after the placement decision is stable.
Open Size & PrintA fast studio preflight
Mark, place, compare, then return to the client.
The useful result is not a simulated tattoo. It is a clearer placement reference for the next real-world check.
01
Upload the body photo
Use the actual placement area in a neutral, straight-on posture.
02
Mark two landmarks
Choose the visual axis that matters for this design instead of assuming perfect bilateral anatomy.
03
Place the stencil
Adjust position, scale, rotation, opacity, and optional mirror ghost while watching angle and center offset separately.
04
Export the reference
Bring the PNG back to the consultation, then confirm placement on the standing client before transfer.
FAQ
Centerline tattoo placement questions.
The checker is intentionally narrow: it measures alignment inside one photo and leaves anatomy, final transfer, and body-fit judgment to the artist.
It lets you mark two artist-chosen landmarks on a body photo, place one stencil over that photo, and compare the stencil's vertical design axis with the visual body axis you defined.
No. It deliberately does not infer anatomy. You choose the landmarks and the axis because real bodies are not perfectly symmetrical and the useful visual reference can depend on the placement and design.
Yes. It is designed for placements where a chosen visual axis matters, including sternum, spine, chest-center, back-center, and other centered ornamental or geometric work. Final placement still has to be checked on the client.
They are measurements inside the uploaded photograph. The angle compares the design axis with your chosen body axis, while center offset reports lateral displacement as a percentage of photo width. They are not physical measurements or anatomical judgments.
No. Centerline Checker is a browser-local alignment reference for one body photo. Fit to Body in the StencilStudio iPhone app is the separate workflow for wrap, taper, body-line direction, optional body-photo preview, and PNG or PDF export.
No. File reading, overlay placement, guide calculations, and PNG export happen locally in the browser for this tool.
Related tattoo tools
Continue from alignment into production.
Use the next tool only when it solves the next real studio job.
View all tattoo tools01LetteringCreate tattoo lettering from curated fonts or preserve a real signature or handwritten note, then mirror and export SVG, PNG, or a true-size PDF.Curated fonts + handwritingSVG + PNG1:1 PDF02Flash Sheet MakerArrange finished flash designs into a clean print or social sheet with local layout, flash-day labels, individual artwork export, and an artist manifest.Flash-day labelsPrint + socialArtist manifest + PNG03Patchwork PlannerArrange multiple tattoo ideas across outer, inner, and side arm maps, label visual roles, reserve future space, inspect spacing, and export one consultation plan.3 arm viewsFuture-space zonesBrowser-local export
Practical guides
Need to change how the stencil follows the body?
Continue with Fit to Body on iPhone
Centerline Checker gives you a photo-space alignment reference. Use StencilStudio Fit to Body when the next problem is wrap, taper, or body-line direction.